CN112623024B - Steering system and engineering vehicle - Google Patents
Steering system and engineering vehicle Download PDFInfo
- Publication number
- CN112623024B CN112623024B CN202011610686.8A CN202011610686A CN112623024B CN 112623024 B CN112623024 B CN 112623024B CN 202011610686 A CN202011610686 A CN 202011610686A CN 112623024 B CN112623024 B CN 112623024B
- Authority
- CN
- China
- Prior art keywords
- damping
- steering
- cavity
- oil cylinder
- steering wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/021—Determination of steering angle
- B62D15/0215—Determination of steering angle by measuring on the steering column
- B62D15/022—Determination of steering angle by measuring on the steering column on or near the connection between the steering wheel and steering column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/001—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits the torque NOT being among the input parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
- B62D7/228—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system acting between the steering gear and the road wheels, e.g. on tie-rod
Abstract
The disclosure relates to a steering system and an engineering vehicle. The steering system comprises a steering wheel, a full-hydraulic steering gear, a steering wheel assembly, a transmission assembly and a damping control assembly, wherein the full-hydraulic steering gear is provided with a right-turning working oil port and a left-turning working oil port and is connected with the steering wheel so as to control the flow direction of hydraulic oil of the right-turning working oil port and the left-turning working oil port through the steering of the steering wheel, the steering wheel assembly comprises a steering axle, a steering wheel and a steering oil cylinder for controlling the turning angle of the steering wheel, a rod cavity and a rodless cavity of the steering oil cylinder are respectively communicated with the right-turning working oil port and the left-turning working oil port, the transmission assembly is connected with the steering wheel, and the damping control assembly comprises a damping oil cylinder mechanically connected with the transmission assembly and at least one damping element for controlling the damping characteristic of the damping oil cylinder. The present disclosure improves comfort of operation and increases high speed stability of the steering system by adding a damping control assembly to the steering system.
Description
Technical Field
The disclosure relates to the field of engineering machinery, in particular to a steering system and an engineering vehicle.
Background
In an engineering vehicle, a steering system is usually connected between a steering wheel and a steering axle through a full hydraulic steering gear to assist a driver in steering operation, wherein the full hydraulic steering gear is connected with a steering oil cylinder through a hydraulic hose, and the steering wheel controls the rotation angle of the full hydraulic steering gear through a rotating shaft to realize power steering.
The full hydraulic steering gear is generally applied to engineering vehicles, but is only suitable for low-speed occasions. For an engineering vehicle equipped with a full hydraulic steering gear, the steering system of the engineering vehicle is an open loop system, has no feedback effect, has little adverse effect when the engineering vehicle runs at low speed, is easy to generate the phenomenon that a steering wheel is drifted when the engineering vehicle runs at high speed, and needs a driver to continuously correct the direction, so that the operability of the engineering vehicle is insufficient.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a steering system and an engineering vehicle, which can change damping of the steering system according to a running state of the vehicle, improve comfort of operation, and increase high-speed stability of the steering system.
In one aspect of the present disclosure, there is provided a steering system including:
a steering wheel;
the full hydraulic steering gear is provided with a right-turning working oil port and a left-turning working oil port and is connected with the steering wheel so as to control the flow direction of hydraulic oil of the right-turning working oil port and the left-turning working oil port through the steering of the steering wheel;
the steering wheel assembly comprises a steering axle, steering wheels which are rotatably arranged at two ends of the steering axle and a steering oil cylinder for controlling the turning angle of the steering wheels, wherein a rod cavity and a rodless cavity of the steering oil cylinder are respectively communicated with a right-turning working oil port and a left-turning working oil port;
the transmission assembly is connected with the steering wheel so as to transmit the rotating torque of the steering wheel; and
a damping control assembly includes a damping cylinder mechanically coupled to the drive assembly and at least one damping element that controls a damping characteristic of the damping cylinder.
In some embodiments, the at least one damping element comprises:
and two ends of the first damping hole are respectively connected with the first cavity and the second cavity of the damping oil cylinder and are provided with a first set damping coefficient.
In some embodiments, the at least one damping element further comprises:
the first end of the second damping hole is connected with the first cavity of the damping oil cylinder and has a second set damping coefficient; and
and the first electromagnetic valve is arranged between the second end of the second damping hole and the second cavity of the damping oil cylinder so as to control the on-off of the oil path.
In some embodiments, the at least one damping element further comprises:
the first end of the third damping hole is connected with the first cavity of the damping oil cylinder and has a third set damping coefficient; and
and the second electromagnetic valve is arranged between the second end of the third damping hole and the second cavity of the damping oil cylinder so as to control the on-off of the oil path.
In some embodiments, the damping control assembly further comprises:
the damping oil tank is connected with the first cavity of the damping oil cylinder; and
and the third electromagnetic valve is arranged between the damping oil tank and the second cavity of the damping oil cylinder and is used for controlling the on-off of an oil supply flow path of the damping oil tank.
In some embodiments, the piston head of the damping cylinder is connected to a piston rod on both the first chamber side and the second chamber side, wherein the piston rod on the first chamber side is mechanically connected to the transmission assembly.
In some embodiments, the transmission assembly comprises:
and the gear and rack mechanism is characterized in that a gear and a steering wheel are coaxially arranged, a rack is fixedly connected to the piston rod on one side of the first cavity of the damping oil cylinder, and the gear and the rack are mutually meshed and used for converting the torque of the steering wheel into the telescopic torque of the piston rod on one side of the first cavity of the damping oil cylinder.
In some embodiments, further comprising:
the rotation angle sensor is arranged on a rotating shaft of the steering wheel, is used for measuring the rotation angle of the steering wheel and is configured to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve according to the measured rotation angle; and/or
And the vehicle speed sensor is used for measuring the rotating speed of the steering wheel and is configured to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve according to the measured rotating speed.
In some embodiments, the steerable wheel assembly further comprises:
the cylinder body is fixedly connected with an axle housing of the steering axle, the cylinder rod is fixedly connected with a piston rod of the steering oil cylinder through an axle housing steering knuckle, and the cylinder rod can stretch and retract relative to the cylinder body by setting a damping coefficient in a fourth mode.
In another aspect of the disclosure, a work vehicle is provided, which includes the above steering system.
According to aspects of the present disclosure, by adding a damping control assembly to a steering system and making the damping control assembly variable in its damping according to a state of vehicle travel, such as a turning angle of a steering wheel and/or a traveling speed, the comfort of operation is improved and the high-speed stability of the steering system is increased.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a steering system according to some embodiments of the present disclosure.
It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar words in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1, the steering system of the embodiment of the present disclosure includes a steering wheel 1, a full hydraulic steering gear 5, a steering wheel assembly, a transmission assembly, and a damping control assembly.
The hydraulic steering gear 5 is connected with the steering wheel 1 (can be connected in a torque-transmitting manner), is provided with a right-turning working oil port R and a left-turning working oil port L, and can control the flow direction of hydraulic oil of the right-turning working oil port R and the left-turning working oil port L by the steering of the steering wheel 1; the steering wheel assembly comprises a steering axle 6, steering wheels rotatably arranged at two ends of the steering axle 6 and a steering oil cylinder for controlling the steering angle adjustment of the steering wheels, wherein a rod cavity and a rodless cavity of the steering oil cylinder are respectively communicated with a right-turning working oil port R and a left-turning working oil port L;
on the basis, the damping control assembly comprises a damping oil cylinder 12 mechanically connected with the transmission assembly and at least one damping element for controlling the damping characteristic of the damping oil cylinder 12. Therefore, the transmission assembly is used as an intermediary, on one hand, the rotating torque of the steering wheel 1 is transmitted to the damping control assembly, on the other hand, the damping effect of the damping control assembly is fed back to the rotating torque of the steering wheel 1, on the condition that the basic structure of the steering system is not influenced, the effect of increasing the damping characteristic of the steering system is achieved, the operation comfort is improved, and the high-speed stability of the steering system is increased.
While the damping elements in the damping control assembly may comprise any device having damping characteristics, such as a damping orifice, a throttle, a damper 7, etc.
Preferably, in some embodiments, the damping element includes a first damping hole 13, both ends of which are respectively communicated with the first cavity and the second cavity of the damping cylinder 12, and which has a first set damping coefficient.
Compared with other damping elements, the first damping hole 13 has the advantages of simple structure and good reliability, and can bidirectionally increase damping characteristics from the first cavity to the second cavity of the damping cylinder 12 or from the second cavity to the first cavity so as to correspond to left turn and right turn of the steering wheel 1, so that the damping characteristics increased by the steering wheel 1 are kept consistent in the left turn and right turn process, and a driver is provided with more balanced and accurate steering feedback.
In order to make the damping characteristic of the damping control system adjustable, in some embodiments, the damping element further comprises: a second orifice 131, a first solenoid valve 14, a third orifice 132, and a second solenoid valve 141.
Two ends of the second damping hole 131 are respectively communicated with the first cavity and the second cavity of the damping oil cylinder 12, are arranged in parallel with the first damping hole 13, and have a second set damping coefficient; and the first electromagnetic valve 14 is used for controlling the on-off of the oil path of the second damping hole 131 and the rod cavity and the rodless cavity of the damping oil cylinder 12.
By adding the second damping hole 131 and controlling the oil path where the second damping hole 131 is located to be opened and closed, the damping characteristic of the damping control system can be provided by the first damping hole 13 alone or the first damping hole 13 and the second damping hole 131 together.
Similarly, the two ends of the third orifice 132 are respectively communicated with the first cavity and the second cavity of the damping cylinder 12, are arranged in parallel with the first orifice 13 and the second orifice 131, and have a third set damping coefficient; and the second electromagnetic valve 141 is used for controlling the on-off of the oil path of the third damping hole 132 and the rod cavity and the rodless cavity of the damping oil cylinder 12.
Thus, the damping characteristics of the damping control system are further enriched by adding the third damping orifice 132, and the total damping coefficient of the damping control assembly may include, in comparison to the resistance calculation of the parallel circuit: r provided by the first orifice 13 alone1Provided by the first orifice 13 and the second orifice 131 together
Provided by the first orifice 13 and the third orifice 132 together
And provided by the first orifice 13, the second orifice 131 and the third orifice 132 in combination
Further, in order to supplement oil to the damping control system in time, in some embodiments, the damping control assembly further includes a damping oil tank 15, which is communicated with the first cavity of the damping oil cylinder 12; in order to prevent the damping oil in the working process of the damping control system from flowing back to the oil tank and change the damping effect, the damping control system further comprises a third electromagnetic valve 142 arranged between the damping oil tank 15 and the first cavity of the damping oil cylinder 12 and used for controlling the on-off of the oil supply flow path of the damping oil tank 15.
Further, in some embodiments, in order to make the damping feedback consistent during left and right turns of the steering wheel 1, the piston head of the damping cylinder 12 is connected with a piston rod at both the first chamber side and the second chamber side, wherein the piston rod at the first chamber side is mechanically connected with the transmission assembly.
When the piston head of the damping cylinder 12 is connected with the piston rod on both the first cavity side and the second cavity side, the effective pressure areas on both sides of the piston head are consistent, and at the moment, under the same stroke of the piston head, the oil pressure pressed in or out by the first cavity and the second cavity is consistent, so that the left-turn and the right-turn obtain the same feedback effect.
In order to adapt to the expansion and contraction process of the damping cylinder 12, in some embodiments, the transmission assembly includes a rack-and-pinion mechanism 3, in which a pinion is disposed coaxially with the steering wheel 1, the rack is fixedly connected to the piston rod on the side of the first chamber of the damping cylinder 12, and the pinion and the rack are engaged with each other to convert the torque of the steering wheel 1 into the expansion and contraction torque of the piston rod on the side of the first chamber of the damping cylinder 12.
The rack and pinion mechanism 3 can convert the rotary motion of the steering wheel 1 into the telescopic motion of the damping oil cylinder 12, and can reversely transmit the damping characteristic applied by the damping control component in the telescopic motion process of the damping oil cylinder 12 to the rotary process of the steering wheel 1 by controlling the meshing relation between the racks and pinions. And the meshing of the gear and the rack is more accurate compared with other transmission modes, so that the motion conversion and transmission processes are also more accurate.
Further, in order to make the damping characteristic of the damping control system adjustable according to the driving state of the vehicle, in some embodiments, the steering system further includes a rotation angle sensor 2 disposed at a rotation shaft of the steering wheel 1, for measuring a rotation angle of the steering wheel 1, and configured to control opening and closing of the first solenoid valve 14 and the second solenoid valve 141 according to the measured rotation angle.
The rotation angle sensor 2 can be replaced by a displacement sensor arranged on a rack on the gear rack mechanism 3 or a damping oil cylinder 12. Of course, the rotation angle sensor 2 may not be installed, and in this case, the first solenoid valve 14 and the second solenoid valve 141 may also be controlled by the vehicle speed or other signals, for example, the steering system further includes a vehicle speed sensor for measuring the rotation speed of the steering wheel and configured to adjust the opening and closing of the first solenoid valve 14 and the second solenoid valve 141 according to the measured rotation speed.
Further, in some embodiments, the steering wheel assembly further comprises a damper 7, the cylinder body is fixedly connected with the axle housing 61 of the steering axle 6, the cylinder rod is fixedly connected with the piston rod of the steering cylinder through the axle housing knuckle 62, and the cylinder rod can extend and contract relative to the cylinder body with a fourth set damping coefficient.
The damper 7 can increase the damping characteristic in the steering process at one side of the steering wheel, is matched with the damping control component which increases the damping characteristic at one side of the steering wheel 1, and jointly increases the damping for the steering system, increases the operating torque of the steering wheel 1, provides the stability of the vehicle under the high-speed driving condition, and overcomes the problem that the steering wheel 1 floats at high speed of a full-hydraulic steering system.
In another aspect of the present disclosure, a work vehicle is provided, comprising a steering system according to any one of the preceding embodiments.
The present application is further described below with reference to the accompanying drawings:
as shown in fig. 1, a steering wheel 1 is connected with a rack and pinion mechanism 3 in a steering column 4 through a rotation angle sensor 2, the steering column 4 is connected with a full hydraulic steering gear 5, and then a right-turn working oil port R and a left-turn working oil port L of the full hydraulic steering gear 5 are respectively connected with a steering oil cylinder and a steering oil cylinder. The pressure oil port P of the full hydraulic steering gear 5 is communicated with the hydraulic pump 11, so that the hydraulic pump 11 pumps oil from the oil tank 9 and supplies the oil to the full hydraulic steering gear 5 for use, and the oil return port T is communicated with the oil tank 9 through the filter 8 so as to filter impurities in the returned oil.
Install attenuator 7 on the steer axle 6, the one end of attenuator 7 links to each other with axle housing 61 on the steer axle 6, and the axle housing knuckle 62 on the other end and the steer axle 6 links to each other. The steering column 4 is provided with a rotation angle sensor 2. The gear in the rack and pinion mechanism 3 is arranged on the steering column 4, and one end of the rack is connected with the damping oil cylinder 12. The two oil chambers of the damping cylinder 12 are communicated through the first damping hole 13, the second damping hole 131, the first solenoid valve 14, the third damping hole 132 and the second solenoid valve 141. The oil chamber on one side of the damping oil cylinder 12 is connected with the damping oil tank 15 through a third electromagnetic valve 142.
And the first solenoid valve 14, the second solenoid valve 141, and the third solenoid valve 142 are two-position two-way solenoid valves. The deenergized state of the first solenoid valve 14 and the second solenoid valve 141 may be either an off state or an on state.
Thus, in a low-speed driving state:
at this time, the third electromagnetic valve 142 is powered off, and the damping oil cylinder 12 is disconnected from the damping oil tank 15; the first electromagnetic valve 14 and the second electromagnetic valve 141 are powered on, when the steering wheel 1 rotates, the rotation of the steering wheel 1 is converted into the movement of the rack through the rack-and-pinion mechanism 3, the movement of the rack drives the damping oil cylinder 12 to move, and the movement of the damping oil cylinder 12 enables oil in oil chambers at two ends of the damping oil cylinder 12 to generate certain damping through the first damping hole 13, the second damping hole 131 and the third damping hole 132. At the moment, the damping generated by the damping oil cylinder in the motion process is smaller.
In the high-speed driving state:
at this time, the third electromagnetic valve 142 is powered off, and the damping oil cylinder 12 is disconnected from the damping oil tank 15; the first electromagnetic valve 14 and the second electromagnetic valve 141 are powered off, when the steering wheel 1 rotates, the rotation of the steering wheel 1 is converted into the movement of a rack through the rack-and-pinion mechanism 3, the movement of the rack drives the damping oil cylinder 12 to move, and the movement of the damping oil cylinder 12 enables oil in oil cavities at two ends of the damping oil cylinder 12 to generate large damping through the first damping holes 13.
And under the state of oil supplement of the damping system:
when the oil on the two sides of the damping oil cylinder 12 is reduced or the system leaks oil, the third electromagnetic valve 142 is powered on, and the oil in the damping oil tank 15 enters the oil chambers on the two sides of the damping oil cylinder 12 through the third electromagnetic valve 142 to realize oil supplement.
Therefore, according to the embodiment of the present disclosure, by adding a damping control component to the steering system and making the damping control component capable of changing its own damping according to the running state of the vehicle, such as the turning angle and/or the running speed of the steering wheel, the comfort of operation is improved and the high-speed stability of the steering system is increased.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A steering system, characterized by comprising:
a steering wheel;
the full hydraulic steering gear is provided with a right-turning working oil port and a left-turning working oil port and is connected with the steering wheel so as to control the flow direction of hydraulic oil of the right-turning working oil port and the left-turning working oil port through the steering of the steering wheel;
the steering wheel assembly comprises a steering axle, steering wheels which are rotatably arranged at two ends of the steering axle and a steering oil cylinder for controlling the turning angle of the steering wheels, wherein a rod cavity and a rodless cavity of the steering oil cylinder are respectively communicated with a right-turning working oil port and a left-turning working oil port;
the transmission assembly is connected with the steering wheel so as to transmit the rotating torque of the steering wheel; and
and the damping control assembly comprises a damping oil cylinder mechanically connected with the transmission assembly and at least one damping element for controlling the damping characteristic of the damping oil cylinder, and the damping control assembly changes the damping of the damping control assembly according to the rotating angle and/or the running speed of the steering wheel.
2. The steering system of claim 1, wherein at least one damping element comprises:
and two ends of the first damping hole are respectively connected with the first cavity and the second cavity of the damping oil cylinder and are provided with a first set damping coefficient.
3. The steering system of claim 1, wherein at least one damping element further comprises:
the first end of the second damping hole is connected with the first cavity of the damping oil cylinder and has a second set damping coefficient; and
and the first electromagnetic valve is arranged between the second end of the second damping hole and the second cavity of the damping oil cylinder so as to control the on-off of the oil path.
4. The steering system of claim 1, wherein at least one damping element further comprises:
the first end of the third damping hole is connected with the first cavity of the damping oil cylinder and has a third set damping coefficient; and
and the second electromagnetic valve is arranged between the second end of the third damping hole and the second cavity of the damping oil cylinder so as to control the on-off of the oil path.
5. The steering system of claim 1, wherein the damping control assembly further comprises:
the damping oil tank is connected with the first cavity of the damping oil cylinder; and
and the third electromagnetic valve is arranged between the damping oil tank and the second cavity of the damping oil cylinder and is used for controlling the on-off of an oil supply flow path of the damping oil tank.
6. The steering system of claim 1, wherein the piston head of the damping cylinder is connected to a piston rod on both the first chamber side and the second chamber side, wherein the piston rod on the first chamber side is mechanically connected to the transmission assembly.
7. The steering system of claim 1, wherein the transmission assembly comprises:
and the gear and rack mechanism is characterized in that a gear and a steering wheel are coaxially arranged, a rack is fixedly connected to the piston rod on one side of the first cavity of the damping oil cylinder, and the gear and the rack are mutually meshed and used for converting the torque of the steering wheel into the telescopic torque of the piston rod on one side of the first cavity of the damping oil cylinder.
8. The steering system according to claim 1, wherein the at least one damping member includes a first damping hole, a second damping hole, a third damping hole, a first solenoid valve and a second solenoid valve, both ends of the first damping hole are connected with the first chamber and the second chamber of the damping cylinder, respectively, and has a first set damping coefficient, the first end of the second damping hole is connected with the first cavity of the damping oil cylinder, and has a second set damping coefficient, the first electromagnetic valve is arranged between the second end of the second damping hole and the second cavity of the damping oil cylinder to control the on-off of the oil path, the first end of the third damping hole is connected with the first cavity of the damping oil cylinder, and have the third and set for damping coefficient, the second solenoid valve sets up between the second chamber of third orifice second end and damping cylinder in order to control the break-make of place oil circuit, wherein, steering system still includes:
the steering angle sensor is arranged on a rotating shaft of the steering wheel, is used for measuring the steering angle of the steering wheel, and is configured to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve according to the measured steering angle; and/or
And the vehicle speed sensor is used for measuring the rotating speed of the steering wheel and is configured to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve according to the measured rotating speed.
9. The steering system of claim 1, wherein the steerable wheel assembly further comprises:
the cylinder body is fixedly connected with an axle housing of the steering axle, the cylinder rod is fixedly connected with a piston rod of the steering oil cylinder through an axle housing steering knuckle, and the cylinder rod can stretch and retract relative to the cylinder body by setting a damping coefficient in a fourth mode.
10. A working vehicle, characterized by comprising a steering system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610686.8A CN112623024B (en) | 2020-12-30 | 2020-12-30 | Steering system and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610686.8A CN112623024B (en) | 2020-12-30 | 2020-12-30 | Steering system and engineering vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112623024A CN112623024A (en) | 2021-04-09 |
| CN112623024B true CN112623024B (en) | 2022-07-12 |
Family
ID=75286666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011610686.8A Active CN112623024B (en) | 2020-12-30 | 2020-12-30 | Steering system and engineering vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112623024B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100471894B1 (en) * | 2002-11-28 | 2005-03-09 | 현대자동차주식회사 | Hydraulic power steering for vehicle |
| CN202294936U (en) * | 2011-11-04 | 2012-07-04 | 浙江诺力机械股份有限公司 | Steering handle with damping device |
| CN102530064B (en) * | 2011-12-21 | 2014-02-26 | 中联重科股份有限公司 | Engineering mechanical vehicle, vehicle steering following control system and vehicle steering following control method |
| CN103373388B (en) * | 2012-04-19 | 2016-12-14 | 华南理工大学 | A kind of all hydraulic pressure steering-gear steering wheel angle position control device |
| CN103644248B (en) * | 2013-12-13 | 2016-01-20 | 江苏大学 | Controlled used appearance and the magnetorheological used case of damping and controlling method thereof |
| CN106926898B (en) * | 2017-04-28 | 2018-04-06 | 吉林大学 | A kind of line traffic control hydraulic steering system |
-
2020
- 2020-12-30 CN CN202011610686.8A patent/CN112623024B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112623024A (en) | 2021-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100152971A1 (en) | Steering control apparatus | |
| US5718304A (en) | Four-wheel steering system for vehicle | |
| JP4485802B2 (en) | Hydraulic servo steering device | |
| CN104608819A (en) | Multi-axle steering system for multi-axle vehicle and multi-axle vehicle | |
| US4779693A (en) | Rear wheel steering apparatus for an automobile | |
| US5209317A (en) | Electro-hydraulic vehicular power steering system with closed center valving | |
| US3876030A (en) | Power steering system | |
| CN113147888B (en) | Steering gear, power-assisted steering system and crane | |
| CN112623024B (en) | Steering system and engineering vehicle | |
| CN105235741B (en) | A kind of variable automobile gearratio steering based on hydraulic system | |
| JPS59128055A (en) | 4-wheel steering gear for vehicle | |
| US8020647B2 (en) | Steering control system | |
| JPH0156018B2 (en) | ||
| CN106926898A (en) | A kind of line traffic control hydraulic steering system | |
| CN106882264B (en) | Electric control variable flow steering power assisting system | |
| CN112455536B (en) | Electro-hydraulic redundant all-wheel steering system | |
| JPH0624948B2 (en) | Hydraulic power steering system for vehicles | |
| KR100534906B1 (en) | Power steering device to velocity using pinion valve | |
| CA2222816A1 (en) | Hydraulic steering assembly with change in transmission ratio and flow amplification | |
| KR960012223B1 (en) | Pressure regulation valve of power steering system | |
| JPH0242713B2 (en) | ||
| JPH0525710B2 (en) | ||
| JPH0349788B2 (en) | ||
| JPH0678066B2 (en) | Car steering device | |
| JPH0240542B2 (en) | SHARYONISHOSARERUPAWAA * SUTEARINGU |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |